European Union's foreign policy chief, Josep Borrell condemned on Monday the bombing of Tripoli Military College by Haftar's forces.
"Recent developments in Libya indicate that an escalation of violence around Tripoli may be imminent." EU website quoted Borrell as saying.
"Today, the work has become more sincere than ever towards a political solution to the crisis in Libya," he added.
The EU has urged all parties to engage in the UN-led political process, stressing to continue efforts, in order to find a peaceful and political solution in Libya.